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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/threading/worker_pool.h"
#include "base/bind.h"
#include "base/debug/trace_event.h"
#include "base/logging.h"
#include "base/task.h"
#include "base/tracked_objects.h"
namespace base {
namespace {
struct PendingTask {
PendingTask(
const tracked_objects::Location& posted_from,
const base::Closure& task)
: posted_from(posted_from),
task(task) {
birth_tally = tracked_objects::ThreadData::TallyABirthIfActive(posted_from);
time_posted = tracked_objects::ThreadData::Now();
}
// Counter for location where the Closure was posted from.
tracked_objects::Births* birth_tally;
// Time the task was posted.
tracked_objects::TrackedTime time_posted;
// The site this PendingTask was posted from.
tracked_objects::Location posted_from;
// The task to run.
base::Closure task;
};
DWORD CALLBACK WorkItemCallback(void* param) {
PendingTask* pending_task = static_cast<PendingTask*>(param);
UNSHIPPED_TRACE_EVENT2("task", "WorkItemCallback::Run",
"src_file", pending_task->posted_from.file_name(),
"src_func", pending_task->posted_from.function_name());
tracked_objects::TrackedTime start_time = tracked_objects::ThreadData::Now();
pending_task->task.Run();
tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
pending_task->birth_tally, pending_task->time_posted,
start_time, tracked_objects::ThreadData::Now());
delete pending_task;
return 0;
}
// Takes ownership of |pending_task|
bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
ULONG flags = 0;
if (task_is_slow)
flags |= WT_EXECUTELONGFUNCTION;
if (!QueueUserWorkItem(WorkItemCallback, pending_task, flags)) {
DLOG(ERROR) << "QueueUserWorkItem failed: " << GetLastError();
delete pending_task;
return false;
}
return true;
}
} // namespace
bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
Task* task, bool task_is_slow) {
PendingTask* pending_task =
new PendingTask(from_here,
base::Bind(&subtle::TaskClosureAdapter::Run,
new subtle::TaskClosureAdapter(task)));
return PostTaskInternal(pending_task, task_is_slow);
}
bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
const base::Closure& task, bool task_is_slow) {
PendingTask* pending_task = new PendingTask(from_here, task);
return PostTaskInternal(pending_task, task_is_slow);
}
} // namespace base
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